Photocatalytic Degradation of Organics in Municipal Treated Wastewater in a Re-Circulation Reactor


In this paper, an experimental investigation on the effect of parameters namely concentration, solar radiation intensity and exposure time on the photo oxidation of pollutants in secondary treated municipal wastewater has been presented. TiO2 was used as the photo catalyst and the experiments were carried out in the month of February 2012 in Oman. The reactor was a glass tube constructed with the provision of adding a reflector. The results showed that photo catalytic treatment is very effective for dilute solutions and the presence of reflector enhances the photo degradation. The reduction in Chemical Oxygen Demand (COD) obtained at the experimental conditions of 0.007 m3/hr flow rate, 15° inclination angle and 1 g·L-1 TiO2 dosage was 18%. The presence of the reflector increased the degradation to 25% at the above experimental conditions.

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A. Cheriyan, J. Sarkar, F. Sheik and M. Baawain, "Photocatalytic Degradation of Organics in Municipal Treated Wastewater in a Re-Circulation Reactor," Journal of Environmental Protection, Vol. 4 No. 12, 2013, pp. 1449-1452. doi: 10.4236/jep.2013.412166.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] M. Cathy, K. J. Peter, A. Morgan, M. P. Pat and M. Abdulrahman, “Development of a Slurry Continuous Flow Reactor for Photo Catalytic Treatment of Industrial Wastewater,” Journal of Photochemistry and Photobioloigy: A Chemistry, Vol. 211, No. 1, 2010, pp. 42-46.
[2] R. L. Prieto, S. Miralles-Cuevas, J. Oller, F. I. Pilar, A. Aguera, J. Blanco and J. Malato, “Optimisation of Mild Solar TiO2 Photocatalysis as a Tertiary Treatment for Municipal Wastewater Treatment Plants,” Applied Catalysis B: Environmental, Vol. 128, A Special Issue Dedicated to Jean-Marie Herrmann, 2012, pp. 119-125.
[3] D. Robert, A. Piscopo and J. V. Weber, “Selective Photo Degradation of Organopollutant Mixtures in Water,” Solar Energy, Vol. 77, No. 5, 2004, pp. 553-558.
[4] A. Sobczynski and A. Dobasz, “Water Purification by Photocatalysis on Semiconductors,” Polish Journal of Environmental Studies, Vol. 10, No. 4, 2001, pp. 195-205.
[5] M. Kositzi, I. Poulios, S. Malato, J. Caceres and A. Campos, “Solar Photocatalytic Treatment of Municipal Wastewater,” Water Research, Vol. 38, No. 5, 2004, pp. 1147-1154.
[6] V. Sarria, S. Kenfack, O. Guillod and C. Pulgarin, “An-Innovative Coupled Solar Biological System at Field Pilot Scale for the Treatment of Bio Recalcitrant Pollutants,” Journal of Photochemistry and Photobiology. A: Chemistry, Vol. 159, No. 1, 2003, pp. 88-99.
[7] S. Malato, J. Blanes, A. Vidal, D. Alarcon, M. I. Maldonado, J. Caceres and W. Gernjak, “Applied Studies in Solar Photo Catalytic Detoxification: An Overview,” Solar Energy, Vol. 75, No. 4, 2003, pp. 329-336.
[8] J. I. Ajona and A. Vidal, “The Use of CPC Collection for Detoxification of Contaminated Water; Design, Construction and Preliminary Results,” Solar Energy, Vol. 68, No. 1, 2000, pp. 109-120.
[9] S. Malato, J. Blanco, D. C. Alarcon, M. I. Maldonado, F. I. Ibanez and W. Gernjak, “Photocatalytic Decontamination and Disinfection of Water with Solar Collectors,” Catalysis Today, Vol. 122, No. 1-2, 2007, pp. 137-149.
[10] M. Tanveer and T. G. Guyer, “Solar Assisted Photo Degradation of Wastewater by Compound Parabolic Collectors: Review of Operational and Design Paarameters,” Renewable and Sustainable Energy Reviews, Vol. 24, 2013, pp. 534-543.
[11] C. Sichel, J. Blanco, S. Malato and F. I. Pilar, “Effects of Experimental Conditions on E. coli Survival during Solar Photocatalytic Disinfection,” Journal ofPhotochemistry and Photobiology A: Chemistry, Vol. 189, No. 2-3, 2007, pp. 239-246.

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